Plastic Inline Check Valve One-Way Non-Return 4–12mm Hose
Plastic Inline Check Valve One-Way Non-Return 4–12mm Hose
Plastic Inline One-Way Check Valve – 4mm, 6mm, 8mm, 10mm & 12mm
Keep fuel, water, gas, and other fluids flowing in the right direction with this professional-grade plastic inline check valve. Designed for a wide range of applications — from marine and automotive to agriculture and outdoor power equipment — this transparent non-return valve is an easy, no-assembly solution for preventing backflow in your fluid lines.
Key Features
- One-Way Flow Control: Shutoff structure prevents fluid from flowing back toward the source tank, keeping it in the line where it belongs.
- Clear Flow Direction Indicator: An arrow is molded directly onto the valve body so you always install it the right way — no guesswork.
- Wide Compatibility: Suitable for water, petrol, diesel, oils, and other common fluids. Works with UTV, Side-by-Side, Quad, Dirt Bike, Jet Ski, Waverunner, Boat, Truck, Car, Motorcycle, Tractor, Camper, Lawn Mower, Blower, Pressure Washer, and more.
- Multiple Size Options: Available in equal-end hose internal diameters of 4mm, 6mm, 8mm, 10mm, and 12mm — choose the size that matches your hose.
- Easy Installation: No assembly or special tools required. Simply insert into your existing hose line and secure.
- Transparent Body: See fluid flow at a glance for quick visual confirmation.
Specifications
| Material | Plastic (Transparent) |
| Hose Internal Diameter | 4mm / 6mm / 8mm / 10mm / 12mm (equal ends) |
| Opening Pressure | >1.5 bar |
| Structure | Shutoff / One-Way Non-Return |
| Compatible Fluids | Water, Petrol, Diesel, Oils, and other common liquids |
| Color | Transparent |
| Country of Origin | Made in China |
Package Contents
- 1 × Inline One-Way Check Valve (Non-Return)
Note: Due to monitor color variations, the actual product appearance may differ slightly from images. Manual measurement may allow for ±1–10mm variance.
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Frequently Asked Questions
Q: What sizes are available for this plastic inline check valve?
A: This one-way non-return check valve is available in five hose internal diameter sizes: 4mm, 6mm, 8mm, 10mm, and 12mm. All sizes feature equal ends, so both sides of the valve have the same diameter for a simple, symmetrical hose connection.
Q: Is this check valve suitable for fuel lines, or only water?
A: This inline check valve is compatible with a wide variety of fluids including water, petrol, diesel, oils, and other common liquids, making it suitable for fuel lines, irrigation systems, marine applications, and more. Always confirm compatibility with the specific fluid in your application before installation.
Q: How do I know which direction to install the check valve?
A: An arrow is clearly marked on the valve body indicating the correct direction of fluid flow. Simply align the arrow with the intended flow direction in your hose line for proper one-way operation.
Q: Does this valve require any special tools or assembly to install?
A: No special tools or assembly are required. The check valve is designed for straightforward inline installation — just insert it into your hose line and secure the connections. It arrives ready to use straight out of the packaging.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.